Improvement in school-desks



N.PETE.RS, PHOTO-LIYHOGRAPHER. WASHINGTON D c aten safe este cette,

'WILLIAM DoYLn, or EATON, onto.

Letters Patent N o. 109,304, dated November 15, 1870.

IMPRovEMEN-r IN scHooL-nEsKs.

The Schedule referred to in 'these Letters Patent and making part of the same.

'To all 'whom it may concern V4Be it known that I, WILLIAM E. DOYLE, ot' Eaton, in the county of Preble and State of Ohio,

have invented a new and valuable Improvement in School-Desks; and I do hereby declare that the following is a full, clear, and exact description -of the construction and operation ofthe same, reference being had to the annexed drawing making a part ot' this specification, and to the letters and iigures of reference marked thereon. I

Figure 1 ofthe drawing is a central vertical section of my invention.

YFigure 2 is a detached vie'w of the slotted semicircular arc.` My invention relates to school-furniture, and consists in' the construction and novel arrangement of semicrcular. slotted arms attached to each end. of the table and seat ofv a school-desk, and designed to facili .itate theready adjustment thereof, verticallyor hori- Zontally, according to requirement.

Theletter A of the drawing designates my combined school-desk and seat; l B represents the desk-board; and

G, the seat thereof.v D D represent the standards.

.1: Secured firmly to the under side of the desk-board,

at each en'dlthereot', is a semicircular arc or arm a, of metal, provided with the quadrant slots e e.

Gr,"designates a horseshoe-shaped casting fastened to theinnerfside ofthe standard by its center, and having its ends bent outward to admit the semicircular platea. l

Boltsz 'z pass from the standard through the quadrant slots of the arc, and are secured to the ends of the casting G. p

This arrangement keeps the bolts or pins always horizontal, and prevents them from binding on the arc a or becoming bent downward by pressure.

It is apparent that when the-desk-board assumes the horizontal' position it is perfectly rmandsteady Each bolt s is, at the end ot' its quadrant slot,` nearest the scholar, and any pressure on this side of the desk-board onlyscrves to secure it more firmly in its position. l

Then the desk-board is thrown upright the'weight thereof is transferred inward toward the seat-back, and serve's to prevent any jar/ring or slight shock from throwing it down into the horizontal position again.

A precisely similar arrangement of devices is pro-- `vided for the seat, and similar letters have been used vtodcsignate like parts with reference to thc mechan- 

